Aclerk has 1/2 book of stamps on monday. on tuesday, he used 1/10 of the book of stamps. how much of the book of stamps is left?

a) 3/10
b) 2/5
c) 3/5
d) 9/10

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Which of the following is the graph of y= square root -x-3

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is